<template>
  <div>
    <!-- 面包屑区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <!-- 添加分类按钮 -->
      <el-row>
        <el-col :span="8">
          <el-button type="primary" @click="showAddCateDialog"
            >添加分类</el-button
          >
        </el-col>
      </el-row>
      <!-- 表格区域 -->
      <tree-table
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        border
        class="tree_table"
      >
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color: #67c23a"
          ></i>
          <i class="el-icon-error" style="color: red" v-else></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            size="mini"
            type="success"
            v-else-if="scope.row.cat_level === 1"
            >二级</el-tag
          >
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="opt" slot-scope="scope">
          <el-button
            size="mini"
            type="primary"
            icon="el-icon-edit"
            @click="showEditCateDialog(scope.row.cat_id)"
            >编辑</el-button
          >
          <el-button
            size="mini"
            type="danger"
            icon="el-icon-delete"
            @click="deleteCate(scope.row.cat_id)"
            >删除</el-button
          >
        </template>
      </tree-table>
      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>








    <!-- 添加分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed"
    >
      <el-form
        ref="addCateFormRef"
        :model="addCateForm"
        label-width="80px"
        :rules="addCateFormRules"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类">
          <!-- 级联选择框 -->
          <el-cascader
            expand-trigger="hover"
            v-model="selectKeys"
            :options="parentCateList"
            :props="cascaderProps"
            @change="parentCateChanged"
            clearable
          >
          </el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑分类对话框 -->
    <el-dialog
      title="编辑分类"
      :visible.sync="editCateDialogVisible"
      width="50%"
    >
      <el-form
        ref="editCateFormRef"
        :model="editCateForm"
        label-width="80px"
        :rules="editCateFormRules"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="editCateForm.cat_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editCate">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 10,
      },
      cateList: [],
      total: 0,
      columns: [
        {
          label: "分类名称",
          prop: "cat_name",
        },
        {
          label: "是否有效",
          type: "template",
          template: "isok",
        },
        {
          label: "排序",
          type: "template",
          template: "order",
        },
        {
          label: "操作",
          type: "template",
          template: "opt",
        },
      ],
      addCateDialogVisible: false,
      // 添加表单对象
      addCateForm: {
        cat_name: "",
        cat_pid: 0,
        cat_level: 0,
      },
      // 添加表单验证规则
      addCateFormRules: {
        cat_name: [
          { required: true, message: "请输入分类名称！", trigger: "blur" },
        ],
      },
      editCateFormRules: {
        cat_name: [
          { required: true, message: "请输入分类名称！", trigger: "blur" },
        ],
      },
      // 父级分类列表
      parentCateList: [],
      // 选中的父级分类id的数组
      selectKeys: [],
      // 指定级联选择器的配置对象
      cascaderProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      editCateDialogVisible: false,
      editCateForm: {
        cat_name: "",
        cat_id: 0,
      },
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: this.queryInfo,
      });
      console.log(res);
      if (res.meta.status !== 200)
        return this.$message.error("获取商品分类列表失败！");
      this.cateList = res.data.result;
      this.total = res.data.total;
      this.$message.success("获取商品分类成功！");
    },
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize;
      this.getCateList();
    },
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage;
      this.getCateList();
    },
    showAddCateDialog() {
      this.getParentCateList();
      this.addCateDialogVisible = true;
    },
    async getParentCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: { type: 2 },
      });
      if (res.meta.status !== 200)
        return this.$message.error("获取父级分类失败！");
      console.log(res);
      this.parentCateList = res.data;
    },
    // 选择器发生变化时触发函数
    parentCateChanged() {
      console.log(this.selectKeys);
      if (this.selectKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectKeys[this.selectKeys.length - 1];
        this.addCateForm.cat_level = this.selectKeys.length;
        return;
      } else {
        this.addCateForm.cat_pid = 0;
        this.addCateForm.cat_level = 0;
      }
    },
    addCate() {
      console.log(this.addCateForm);
      this.$refs.addCateFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.post(
          "categories",
          this.addCateForm
        );
        if (res.meta.status !== 201)
          return this.$message.error("添加分类失败！");
        this.$message.success("添加分类成功！");
        this.getCateList();
        this.addCateDialogVisible = false;
      });
    },
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields();
      this.selectKeys = [];
      this.addCateForm.cat_pid = 0;
      this.addCateForm.cat_level = 0;
    },
    async deleteCate(id) {
      console.log(id);
      const confirmResult = await this.$confirm(
        "此操作将永久删除该分类, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm")
        return this.$message.warning("取消了删除");
      const { data: res } = await this.$http.delete(`categories/${id}`);
      if (res.meta.status !== 200) return this.$message.error("删除失败!");
      this.$message.success("删除成功!");
      this.getCateList();
    },
    async showEditCateDialog(id) {
      const { data: res } = await this.$http.get(`categories/${id}`);
      if (res.meta.status !== 200)
        return this.$message.error("获取分类信息失败!");
      this.$message.success("获取分类信息成功!");
      this.editCateForm = res.data;
      console.log(res);
      this.editCateDialogVisible = true;
    },
    async editCate() {
      const { data: res } = await this.$http.put(
        `categories/${this.editCateForm.cat_id}`,
        {
          cat_name: this.editCateForm.cat_name,
        }
      );
      if (res.meta.status !== 200)
        return this.$message.error("编辑分类信息失败!");
      this.$message.success("编辑分类信息成功!");
      this.getCateList();
      this.editCateDialogVisible = false;
    },
  },
};
</script>

<style scoped>
.tree_table {
  margin-top: 16px;
}
</style>